The Seiko 5421-5100 is a watch model based on the 5421 movement.
Parts List
SA4W04GM01 | crystal |
35MASNA1 | crown |
0A1800N01 | case back gasket |
Caliber 5421
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_1.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_2.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_3.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_4.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_5.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_6.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_7.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_8.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_9.jpg)
The Seiko 5421-5100 is a watch model based on the 5421 movement.
SA4W04GM01 | crystal |
35MASNA1 | crown |
0A1800N01 | case back gasket |